George a



(No Model.)

G. A. GOODSON.

I DIE FOR MATRIX MAKING MACHINES. No. 414,636. Patented Nov. 5, 1889.

l W I I 73 Z7 W1 ESSE'S v ITLLTIEFA Jwmwfiw W WW I Puma Mung-10WWaikingiun. 1C.

UNITED STATES PATENT GEORGE A. GOODSON, OF MINNEAPOLIS, MINNESOTA,ASSIGNOR TO THE MINNEAPOLIS ELECTRO MATRIX COMPANY, OF SAME PLACE.

DIE FOR MATRIX-MAKING MACHlNES.

SPECIFICATION forming part Letters Patent No. 414,636, dated November 5,1889.

Original application filed May 25, 1888, Serial N b.

To (all whom it may concern:

Be it known that I, GEORGE A. GoonsoN, a citizen of the Dominion ofCanada, residing atMinneapolis, in the county of Hennepin and State ofMinnesota, have invented certain new I and useful Improvements in Diesfor Matrix- Making Machines; and I do hereby declare the following to bea full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

My invention relates to type-dies for matrixqnaking machines, and is adivision of my former application for Letters Patent filed May 25, 1888,and given Serial No: 275,034. I have illustrated said invention in theaccompanying drawings, and have fully disclosed the same in thefollowing specification and claims.

In the drawings, Figure 1 is a side elevation of one form of dieembodying my invention. Fig. is a bottom or under side view ofthe same.Fig. 3 is a partial transverse vertieal section on line a; a, Fig. 2.Fig. a is a like view of a modified construction. Fig. 5 is a partiallongitudinal section of a die on line y y, Fig. 2. Fig. 6 is a similarView of a modified construction. Figs. 7 and S are sections of a body ofmatrix material shown in isometric perspective through impressions madetherein.

In the practical working of matrix-making machines it is found thatafter an impression of a letter has been made, the die, inpassing downinto the material to form the impression for the next adjacent letter,crowds the material between the two impressions toward the precedingimpression, thereby partially filling and closing the same. It will bereadily seen that this is a great difficulty, as the matrix is renderedimperfect, and it is almost impossible to obtain perfect plates from thesame. The same disadvantage occurs also between the succeeding lines ofimpressions, as the dies in passing into the material to form theimpressions in the line will crowd the material between it and thepreviously-formed line of impressions, and thereby partially close themor press them out of shape. To obviate the first of these difficulties,Iform the impression-forming portion of the die with one 275,034. Dividedand this application filed January 31, 1889. Serial No.

298,222. (No inodel.)

or both sides inclined from the face of the die to the right, or awayfrom the previouslyformed impression, and this construction is fully setforth in my former application before referred to. In order to avoid thecrowding of the walls of the impressions, both from the side and fromthe bottom of the same, I form the type-die with one or both of its sidewalls inclined, as just described; and I also form the bottom or foot ofsaid die with a similar incline extending from the face of the dietoward the main body in a direction away from the impressions in. thepreceding line, and I may form the remaining side of said die inclinedin the same manner, if desired. By these constructions the lower wallsof all the impressions in a line will incline upwardly and away from theline of impressions previously formed. IVhen, therefore, the impressionsof the next succeeding line are formed, the crowding of the materialbetween the two lines will only tend to bring said inclined wall into amore nearly vertical position, and the same is true of the side wall ofeach successive impression in the same line. It will thus be seen thatperfect matrices can be readily obtained and the difficulties beforereferred to completely avoided. In actual practice it is found that thecrowding of the material between an impression and an adjacentimpression in the same or succeeding line is never sufficient to bringthe inclined wall of the impression on that side quite into a verticalposition, so that in casting the metal plate is easily separated fromthe matrix-bed and the plates are found to be free from imperfections.

In the drawings, A designates a full length die, the upper part of whichconsists of a polygonal guiding-head or portion a. Below this is acylindrical shank consisting of a portion a, from the lower end of whichprojects the stem or character or impression-forniing portion 6.

In Fig. 1 the die is shown as in a position giving a view of the bottomor foot of the letter. From this figure and from Fig. 2, in which it isshown inverted, it will be seen that the stem or the impression-formingportion of the die has its right side i) inclined outwardly from theface of the die toward the shank or part a, or away from thepreviously-formed impression, and the bottom side 11 0f the stem whichforms the foot of the impression is also inclined in a direction awayfrom the impressions in the line previously formed, as best seen in Fig.5. The effect of this construe tion is, that when a die isimpressed-into the matrix material the right-hand wall and bottom wallof the impression will incline outwardly, as shown in Figs. 7 and 8.

In forming a series of impressions, as in a I word, the straight side ofthe die will be adjacent to the impression preceding in making thesecond and succeeding letters, so that the crowding of the materialbetween two impressions will only tend to bring the inclined wall morenearly into a vertical position, and in forming the second andsucceeding lines the straight or upper side of the stern b will beadjacent to the impressions of the preceding line, with the same result.

In order to secure the least possible crowding of the matrix materialback upon an adjacent previously-formed impression, I may form the sidesof the stem Z) opposite the inclined sides Z) b with a similar incline,re-

spectively, if .desired, as shown in Figs. land 6. These inclined facesmay be parallel with the faces I) and 19 respectively, or they may be ofdiffering angles, as found most desirable.

It will be understood that the form of the main body of the die isimmaterial, and may be of any desired style of construction.

having the bottom and right side incliningoutwardly from the face towardthe body of the die and the 'top and opposing side inclining inwardly.

In testimony whereof I afiix my signature in presence of two witnesses.

GEORGE A. .GOODSON. \Vitnesses:

RoBT. F. GAYLORD, PARKER W. PAGE.

